346 



REVISION" OF THE TENEISIUONIDyE OF AMERICA, 



SITOPHAGUS, Mule. 

 Sitophagus, Muls., Col. France; Latigenes, p. 284. 



Easily known from our other genera by its depressed form, being almost perfectly flat 

 above. The epipleurse are abbreviated. The antenna", though gradually thickening to- 

 ward the tip, are less compact than in Bins, in which also the epipleuree do not attain the 

 tip of the elytra. The sexes differ from each other by the presence of horns on the male, 

 formed by the sides of the genee and the sides of the epistoma. 



Two species are known in our fauna. 



S. pallidus, Say, (I'ytho) Journ, Acad. 3, p. 871; Lee, (Adelina) Ann. Lye. 5, 149;' complanata, Dej. Cat. 



This is the larger of our two species, and has the side of the head in front of the eyes 

 prolonged into a horn on each side of the head of the male. 

 Length .20 inch. 

 Rare in the Middle and Southern States. 



S. Lecontei, Horn; planus | Lee, (Adelina) Ann. Lye. V., 149. 



Differs from the preceding in size and by the head of the male having a second horn 

 on each side, concealed from above by the larger horn formed by the prominence of the 

 sides of the front. 



Length .18 inch. 



Occurs rather abundantly in the Colorado Desert of California, in Owens' Valley, and 

 in Arizona. 



A I, .-KNITS, n. <j. 



Mentum trapezoidal, narrowed toward base, emargmate in front, anterior angles prominent; ligula five, basal 



membrane visible; gular peduncle short, narrow. Maxillary palpi long, see I joint longer than third or fourth, 



slender at base, thickened toward tip, last joint longer than the preceding, conical, flattened and obliquely truncate. 

 Head strongly exsert, very slightly narrower behind the eyes, which are distant, from the prothorax, reniform and n«>l 

 prominent. Head prolonged in front of eyes, frontal suture Indistinct. Epistoma hemi-hexagonal, emarginate in 

 front, almost entirely concealing the Iabrum. Lateral margins of front slightly reflexed. Antennse as long as head 

 and thorax, slender; first joint thicker, second small, third long, equal the two following; joints four to eleven sub- 

 renal, last joint fusiform. Presternum not prominent, behind the coxse, mesosternum oblique, middle coxss with dis- 

 tiuct trochantin. Metasternal parapleural simple, moderate, slightly narrower behind. Metasternum long, body 

 winged. Entercoxal process of abdomen acute. Epipleuraa entire. Tibial spurs distinct; tarsi slender; the first joint 

 of hind tarsi longer than the two succeeding together. Scutell broader I, ban long, sub-quadrate. 



The male has the anterior tarsi very slightly dilated, and a slight brush of hairs near the, tip of the penultimate 

 abdominal segment. 



Tins genus is proposed for an insect to which I have seen nothing similar. The head 

 recalls the form seen in Cerenopus and other Scanrini, though differing from (hem in the 

 tarsal vestiture, the form of the antennse, and tin; distribution of the antennal pores. 



A. pallidus, pale brownish testaceous, sub-opaque, elongate oval. Head moderately but not, coarsely punc- 

 tured. Thorax broader than long, narrower in front, apex feebly emarginate, base feebly Insinuate, sides moderately 



