Article beginning on page 346.
Psyche 9:346, 1900.

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846 PSYCHE. [May, 1902
SOME INSECTS OF THE HUDSONIAN ZONE IN NEW MEXICO.- VIII. COMPILED BY T. D. A. COCKERELL.
The species here listed were collected
on the top of the Las Vegas range at
the end of June, 1901. The determina-
tions are wholly by Mr. Coquillett; the
other matter is by Mr. Cockerell.
Species new to the fauna of New
Mexico are marked with an asterisk.
Comparing the present list with Coquil-
lett's list of the Diptera of Alaska (Pr. Wash. Ac. Sci., igoo), we note that the
faunae are very similar. Twelve of our
species have been actually taken in
Alaska, while several others are reprc-
sented there by allied forms. The great- est points of difference are: (I.) that
we have four of the larger Tachinidae,
including three of meteria, a genus
not given in the Alaska list ; (2.) that we have four Trypetidae, the Alaska list showing only one.
* Ptychoptera leni, 0. S. Also Colorado. SimiiZizi~z uchracezmz, Walker. North
to Alaska, and down to the Middle
Sonoran Zone (Mesilla Valley). Its
presence at the lower levels is doubt-
less due to the migration of swarms.
* Tabanus sonomensis, 0. S. North to
Alaska.
*Anthrax cat~tZ~za,, Coq, There are
no Bombylidae in ibe Alaska list.
38 species of this family are known
from New Mexico, and of these 19
belong to Anf/irax.
Cy~io$ogm callipedzlus, Lw . West to
Sierra Nevada.
* Kmfis i~iangula, Coq, North to Alaska. Discovered by the Harriman Expe-
dition.
* Cheilosia. hodiana, Bigot.
* Chilusia occidentalis, Will.
At Beulah,
N. M. (Canadian Zone), the genus
is represented by C. initis, Lw.
.Syrphw matus, Fall.
N. to Alaska
* Syrphus intrttdens) 0. S. Described
from the coast range of California,
but very close to S. amlopis from
the White Mts., N. H.
* Sphmphoria sziIphztripes, Thorns. N.
to Alaska.
* Sphue~ophuria mctanosa, Will. W. to
California.
* Eristalis otscz~~us, Lw. N. to Alaska. * Myofa. clausa, Lw. N. E. to Maine.
* Panseria radtcum, Fb. N. to Alaska.
Also at Beulah, N. M.
Gouk capifata, DeG. Down to Mesilla
Valley. Also European.
Peletenk aenea, Staeger. A northern
type.
Peleteria tessdlata, Fabr. Northern
and European.
Peleteria rotusfa, Wied. Down to
Mesilla, N. to Canada.
* Con..Zura viitIpcs, Lw.
N. to Alaska.
*T@hritis platy/iera) Lw. N. E. to
Connecticut.
Zephritis plis, Thorns. W. to Cali-
fornia; down to Mesilla, N. M.




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UreZka abstersa, Lw.
Down to Mesilla
Valley ; also in Cuba, etc.
* Urnilia rnevw?w, Walk. S. E. to
Florida.
Sepsis vwlacea, Meig.
Down to Mesilla
Valley.
*Piofhila casei, L. N. to Alaska. It
would seem that this insect must be
native in America.
* ScaMa stagnalis, Fall.
N. to Alaska.
* Oscinis carbonaria. Lw.
N. to Alaska.
* Meromyza ame~icana, Fitch. Also at
Beulah, N. M.
* Borborus epinus, Fall. Also Euro-
pean.
* Borborus geniczdatus, Macq.
LEPIDOPTERA.
The following species, obtained on
the top of Las Vegas range at the end of June, 1901, have been kindly identified
by Dr. H. G. Dyar.
Anarta pfielanofia, Thunb. Also Lab-
rador, etc.
DrasLenk erechtea, Cram.
Chorizagroiis agrestis, Grote.
Chorentis occidenteZLa, Dyar. Also
found in Alaska.
Platyfiilia cosmodactyla, Hbn. This
is the species referred to in PSYCHE,
Nov., 1901, p. 272. Extends to Alaska
and Europe.
P'yausta generusa, G. & R. (?)
HYMENOPTERA, MYRMTCI~AE.
The following ants were taken on the
top of the Las Vegas range at the end of June, 1901, and have been kindly de-
termined by Prof. W. M, Wheeler.
Mynnica brevinodis, Emery. Worker.
"Smaller and darker than those from
New England."
Leptothorax canadensis Provancher.
worker and dealated 9. Does not differ
from specimens which Prof. Wheeler
has from Wis., Pa., and Conn.
Both of these species are new to the
fauna of New Mexico.*
CEPHALIC MORPHOLOGY. Cornstock and
Koclii have lately given us an important paper (Amer. Nat., 1902, vol. 36, p. 13-45, 29 figs.) upon the morphology of the insect head, and the cephalic sclerites at length assume a deeper significance and a new
interest.
In this paper, the view that the head con- sists of seven segments is adopted and ably supported. The areas of the skull are re- viewed and several sclerites hilhei-to dis- regarded are described and aptly named.
The morphology of the thoracic segments
is discussed so far as is necessary to determine the structure of a typical segment, asthe basis for an interpretation of the head, and then the cephalic sclerites are homologized with t.he thoracic ones, and the endoskeleton of the head with that of the thorax.
The presentation of the subject is logical and clear. The argument rests, of course, upon the assumption that homologies he-
twecn the cephalic and the thoracic sclerites exist. If, however, the differentiation of the thoracic sclerites has been only an incident- al mechanical result of strains, due to the - -
'I will take this opportunity to record tlie folio win^ ants, also new to New Mexico, kindly determined by Prof. Wheeler : - Campmoius wawlaius vicinus, Mqr, Truut Spring, Callinas Cation (Ti-ansitioii Zone); Fifrmioz x-tdkni riibii.'nnditi Em., Trout Spring; Liomeio/nwt iocsjiJia.lu;n occidentals, Emery, Komerovilte (Upper Sonoran Zone) ; Eciton callforfimm, Mayr, Las Vega~; Sfenamma. f u h aguia, Buckl. Trout Spring; Brachymyrmex heri depilis, Era., Trout Spring; Crem- astoyaster ^aitcfu/afa, Em., Las Vegcis and Las Vegas Hot Springs; C. l&edata, subsp. comcfd~z var, mwm- mm, Em., Romerovil1e.-T. D, A. C.




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