1903.] NATURAL SCIENCES OF PHILADELPHIA. 183 



which give a marbled appearance to the same; distal, sutural and 

 apical regions with this mottling very indistinct, the spots of greatest 

 size in the distal portion, and very minute proximally; marginal field 

 uniformly colored. 



Length of bod}^ 20-21 mm.; length of tegmina 26.5-30.5 mm.: 

 width of tegmina 10-10.5 mm.; length of pronotmn 6.5-7 mm.; width 

 of pronotvim 9.5-11 mm. 



9. "No resemblance to the male. The insect in repose has a 

 regularly elliptical form, with the liack normally inflated, recalling 

 the form of Corydia or Phoraspis. Prothorax A'ery broad, arched, 

 corneous, un wrinkled, wath the two borders regularly arcuate, though 

 the anterior is stronger so than the posterior ; the margins on the sides 

 form a sharp dentiform angle, Avhich is placed a little posterior; the 

 disk with almost the same ridges as in thecJ', but not the impression. 

 Elytra of the length of the abdomen, hard and corneous, resembhng 

 two vah'es, terminating in rounded points; the surface densely sha- 

 greened ; the nervures as apparent as the principal veins in the corneous 

 mass of the elytra, and very much branched; no anal ridge or only 

 slightly indicated toward the internal (posterior) border of the elytra 

 in the form of a sub-transparent line. Scutellum very slightly uncov- 

 ered. Prothorax and elytra densely haired, especially on the borders. 

 Abdomen broad ; the penultimate segment very arcuate, the last with 

 its posterior half strongly compressed, carinate, rostrate and divided, 

 resembling two closed valves; supra-anal plate rounded and divided. 

 Anal filaments slim and short. 



"Body brown or blackish; tarsi testaceous. Prothorax and elytra 

 brown, the latter marbled with much paler speckles. 



"Length of body 25 mm., length of pronotum 8 mm., width of the 

 pronotum 12.5 mm." 



Larva: "Thee? larvae are a chocolate-brown color and are densely 

 haired. On the disk of the pronotum the hairs form longitudinal 

 lines which correspond to the furrows. The supra-anal plate is trans- 

 verse, a little arcuate, bordered, divided by an emargination; the sub- 

 genital plate with the posterior border arcuate. The form is the same 

 as in Heterogainia." 



Distribution. — This species has ])ceu recorded from the States of 

 Sinaloa, Durango, Vera Cruz and Oaxaca, Mex. In Vera Cruz it has 

 been taken only in the Eastern Cordilleran region. 



Remarks. — The series of five males of this species examined by tlio 

 author exhibits no apparent difference, except a slight variation in 



