AMERICAN COLEOPTERA. 137 



SICYOBIUS n. g. 



Head subretractile, front slightly convex, vertex nearly flat, antenniferous 

 tubercles not prominent. Eyes moderately granulated, entirely divided, the 

 two portions joined by a dark line without lenses, upper division broadly cres- 

 centic, the lower larger, as broad as long. Antennae very little longer than 

 half the body, pubescent but not ciliate, first joint conical constricted at base, 

 second about one-third the length of the first, third a very little longer than 

 the first two together, fourth one-third shorter than the preceding, joints 5 — 10 

 very gradually decreasing, eleventh acute not longer than the tenth, joints 

 5 — 11 together a little longer than three and four together. Thorax cylindrical, 

 sides slightly arcuate. Scutellum transverse. Elytra a little wider than the 

 thorax, humeri obtuse, form elongate, apices obliquely truncate. Anterior 

 coxae subglobular, moderately separated by the presternum the tip of which 

 is not prominent, the coxal cavities not angulate externally. Mesosternum 

 moderately broad, convex in front, the coxal cavities open externally. Meta- 

 sternal episterna very narrow. Femora slightly thickened, the posterior not 

 longer than the first two abdominal segments. Middle tibiae sinuate externally. 

 Tarsi nearly as long as the tibiae, the first joint nearly as long as the next two 

 together. Claws divergent. 



With these characters a genus is defined possessing all the essential 

 characters of the group Apomecynides of the true Lamife, excepting 

 that the anterior coxae are not angulate externally and differs from 

 all the genera of that group by the eyes being entirely divided. In 

 the arrangement proposed by Dr. Leconte it would enter the tribe 

 Hippopsini, from all of the genera of which it differs by the short 

 antennae and divided eyes. 



S. Brousii n. sp. — Cylindrical moderately elongate. Thorax a little longer 

 than wide, cylindrical, slightly expanded at middle, apical margin slightly 

 arcuate, disc coarsely and deeply punctured. Elytra a little wider than the 

 thorax, humeri obtuse, sides feebly arcuately narrowed to apex which is 

 obliquely truncate, surface with rows of punctures which are all rather coarse 

 but alternating in size. Body. beneath and legs clothed with cinereous {lubes- 

 cence, denuded forming small black spots. Body above clothed with pale 

 ochreous pubescence, denser at the sides of the thorax and on the elytra with 

 small spots of white, two patches of which are somewhat larger and form slight 

 oblique bands one between the middle and base, the other behind the middle. 

 Length .20— .40 inch; 6.5—10 mm. (PI. II, fig. 9). 



The general form of this insect is that of Ataxia cnjpta^ without 

 the thoracic spines. 



Several specimens from western Kansas, taken on the Wild Gourd 

 {Cucumis perennis), by Dr. H. A. Brous, after whom I take great 

 pleasure in naming it. To him we are indebted for our first knowledge 

 of the habits of Amblychila. 



ID<E1»IEA n. g. 



Eyes coarsely granulated, narrowly separated on the vertex widely beneath, 

 deeply emarginate, the upper portion much smaller. Front vertical broader 

 above, vertex deeply impressed forming two autennal tubercles. Antennae ^ 



TRANS. AMER. ENT. SOC. VIII. (18) MAY, 18S0. 



