eae SN SE Se 
Ub : + : Y Sued j ‘ i ~ Pk alee erty 2 
74 BULLETIN BROOKLYN ENTOM. SOC. VOL. IV. November 1883.] ie 
Uy < i 
AMBLYCHILA ‘uy. 
(Greek ; amblys—obtuse, and cheilos—labrum.) 
A. cylindriformis, Say, (fig. 1.)—-Black, elytra brown ; head large, 
eyes small; labial palpi shorter than maxillary, with the first joint con- 
cealed under the mentum, the third and fourth elongate ; mandibles 
with 3 teeth; labrum bidentate at middle ; thorax and underside smooth; 
elytra oval with three carinze at each side and irregular, unequal punc- 
tures; legs long and robust ; tarsi short. Wingless. Length 35-38 mm. 
d'-—Hind trochanters acute with two grooves: dense yellow - 
brushes near the two tibial spurs of the middle legs ; last ventral segment 
broadly rounded with large setigerous punctures on each side of the 
middle; pygidium small. 
: © .— Hind trochanters shorter, oval, obtuse at tip ; last ventral seg- 
-. ment somewhat prominent in middle, and sinuate at each side, with a 
_ feeble median longitudinal impression; pygidium very large. 
‘The larva, (fig. 121,) has been fully described by Dr. G. H. Horn, 
Trans. Am. Ent. Soc. vii, p. 29.—It is yellowish—white, head and 
thoracic scutes castaneous, differs by the numbers of eyes (but two) and 
the length of the joints of antennz and palpi from the larve of Omus, 
| Tetracha, and Cicindéla, Antennz with joint two nearty equal to all 
the others combined ; maxillary palpi with the first joint longest, 
third shortest. Length 32 mm, in normal position; 44.5 mm, when 
extended. 
Since the time of its description by Say, (1823) this insect has been 
very rare, but during the last few years it has been found quite abun- 
dantly in Kansas by Messrs. H. A. Brous, Prof. F. H. Snow, and by my 
friend, the late George T. Cooper. 
It lives in holes made in the clayey banks of ravines, is nocturnal 
in its habits, and moves around in a peculiar way, raising its body very 
high and keeping its antennze in constant motion. Its sight is very 
poor. 
Habitat.—Western Kansas, Colorado, Arkansas, Indian Territory, 
N. Mexico, Eastern Arizona, Texas. June, July, August. 
Say, Journ. Ac Phil. 1822, iii. 139; Trans. Am. Phil., new ser., iv, 409 (em- 
end): Thoms.;, Mon: p.'14,4pl. 3, fig. 3-—Lec. Col. off Kans., p. 1. (pl. 2,) figs ae 
Horn, Trans. Am. Ent. Soc., v. 233, (on sexual characters, etc.); Trans. Am. Ent. 
Soc., vii, 28 (on the larva). 
Amblychila Piccolominti Reiche. Ann. Tr. 1838, p!. 10, f. 1-6 ismerely ai smmparnen 
A. eylindriformis with a wrong locality. 
