284 OKO. H. HORN, M. 1). 



lahrum sliolitly arcuate in front, maxillary palpi i-ather slendt'r, the 

 tei-iiiiiial joint as \oug as the preceding, acute. Antennie slender, at 

 least half as long as the body Thorax broader than long, narrower 

 in front, the sides arcuate, anterior angles (jbliquely tunicate (in our 

 species), the ante-basal impression deep, slightly sinuous, limited each 

 side by a short longitudinal impression. Elytra oval, wider at base 

 than the thorax, disc coarsely striato-punctate. Prosternum moder- 

 ate, slightly dilated at apex, the coxal cavities widely open behind. 

 Legs moderate, tibiise slightly broader to a])ex, the outer face slightly 

 grooved near the apex, the posterior pair alone with a small spur. 

 Tarsi moderate in length, the first joint of the posterior pair nearly 

 one-third the length of the tibia. Claws appendiculate. 



It is not without some doubt that I refer tbe small species before 

 me to the present genus, having but one species at hand for com- 

 parison (Z). nlt'uln Jacoby), which is itself abnormal in several re- 

 spects. The open front coxa! cavities, the deep ante-basal impression 

 limited each side by a (very short, it is true) longitudinal impression, 

 the striato-punctate elytra cause me to place it in the LacticcC and 

 Diphaulaca is the (mly genus to which it can be referred, unless a 

 new one be made, and this could not be accurately defined. 



I>. bicolorata n. sp. — Oval, moderately convex, head, thorax and le^s 

 reddish yellow, elytra and abdomen piceous black with faint purple lustre. An- 

 teuiipe riifotestaceous, slightly darker externally. Head smooth. Thorax nearly 

 twice as wide at base as long, narrowed in front, sides arcuate, anterior angles 

 obliquely truncate, disc convex, very spaisely punctate. Elytra wider at base 

 than the thorax, humeri rounded, umbone small, smooth, disc moderately con- 

 vex, coarsely striato-punctate, punctures closely placed and deep, those near the 

 suture very irregular, although variable in the specimens, intervals smooth, 

 metasternuni and abdomen piceous black, shining, the latter sparsely jmnctate. 

 Legs pale rufotestaceous, the posterior femora slightly darker. Length .08 inch. ; 

 2 mm. 



The elytral punctuation is distinctly variable in the four specimens 

 before me, but in all there is a very evident irregularity of the strite 

 near the suture. 



Mr. Jacoby has suggested (" Biologia" vi, i. p. 263) that the genus 

 is not sharply defined as to the species included by Clark, although 

 a species is added (ni.tida) which rather adds to the confusion. 

 While it must be admitted that the species above described difiers some- 

 what generically from the sjiecies which Mr. Jacoby thinks should 

 alone remain (those with anterior angles prominent externally) 1 

 feel unwilling to suggest a new name until the already known species 

 are more cai'cfidly placed. 



