COLEOPTERA. 105 



two-thirds as long and wide as tlie tenth, both transversely elliptical, 

 eleventh very slightly wider than the tenth, slightly longer than wide, 

 abruptly produced in the middle at tip ; last joint of the maxillary palpi 

 very short and robust, conoidal, scarcely one-half longer than wide. Pro- 

 thorax widest at one-third its length from the apex where it is about as wide 

 as the head and about one-sixth wider than long; sides rather strongly 

 arcuate anteriorly, somewhat feebly and evenly so posteriorly ; apex scarcely 

 one-half as long as the pronotal width and nearly three-fourths as long as 

 the base, both feebly arcuate ; posterior angles rounded ; disk rather feebly 

 convex, having a rather deep slightly elongated oval puncture just before the 

 middle, and, at one-third tlie length from the base, a transverse somewhat 

 slender but deeply impressed posteriorly cusped groove, expanded at the 

 cusp point into a large naked pnnctiform impression and terminating at the 

 sides iu large rounded rather shallow spongy-pubescent foveae. Elytra at 

 base very slightly wider than the pronotum ; sides very feebly divergent 

 posteriorly and somewhat feebly arcuate ; disk very slightly longer than 

 wide, moderately convex ; sutural striae close, nearly straight, strong, 

 lateral nearly one-half as long as the elytra, rather well marked, originating 

 in rather large spongy-jiubescent foveae : humeri moderately prominent. 

 Abdomen very slightly shorter than the elytra, and very slightly narrower; 

 sides parallel and straight ; border inclined ; surface moderately convex ; 

 first tliree dorsal segments sub-equal in lengtli ; first two having two strongly 

 divergent strongly marked carinae through slightly more than the basal 

 lialf. Legs rather short and robust ; prosternal foveae large ; under surface 

 of the head without erect sensitive setae ; terminal claw of tarsi very long 

 and strong. Length 1.2—1.3 mm. 



Columbus, Texas, 2; Georgia? 1. 



The description is drawn from a male. The sexual characters of 

 this species are, in the male, very singular nearly equalling in this 

 respect those of sexualis. The third ventral segment is feebly and 

 narrowly sinuate in the middle and slightly swollen at each side of 

 the sinuation ; beyond these swellings laterally two long stout spines 

 protrude from beneath the segment, which are nearly parallel, exter- 

 nally arcuate, and feebly hooked internally at tip; they pass over and 

 touch the surface of the fourth and a part of the fifth segments ; the 

 anterior portion of the fourth segment is emarginate in the middle ; 

 the fifth is transversely lunate and partly encloses the terminal 

 segment ; it is transversely impressed in the middle ; the terminal 

 segment is slightly wider than long, angularly and feebly produced 

 anteriorly, and more roundly and equally feebly so posteriorly, surface 

 convex, sparsely punctate and feebly carinate along the middle. In 

 the female these striking characters entirely disappear, and the termi- 

 nal §egment is simply very abruptly strongly and acutely produced 

 in the middle ; this sex also has the terminal joint of the maxillary 

 palpus less robust. 



