320 NEOTROPICAL PSELAPHIDAE 



as the preceding four segments united, apex rounded, external face strongly 

 convex, internal face slightly convex. Antennae 0.94 mm. long. 



Pronotum slightly transverse, with simple disc and sides which slightly 

 diverge from base to near apex and then become broadly rounded to apical 

 margin; base with three large, subequal, circular pubescent foveae. 



Elytra with rounded humeri. Each elytron with two circular, pubescent 

 basal foveae, a deep and entire sutural stria and a very short discal impression 

 for basal fifth of length. 



Abdomen with five visible tergites in a length ratio of 6/3.5/1/. 5/1. 5 with 

 the first three strongly margined. Six simple sternites in a length ratio of 

 1/2.5/1.5/.8/.5/1.5. 



Metasternum medianly with a broad longitudinal depression and each 

 side with a rounded tumidity. Legs simple save that the posterior tibiae are 

 apically spurred. This spur is long, oblong, angulated at base, truncated at 

 apex. Tarsi slightly more than one-half the tibial length ; first tarsomere short 

 and triangular; second three times as long as first; third longer than second, 

 with a pair of long arcuate, aciculate tarsal claws. 



One specimen from Turrialba, Costa Rica. Probably a female. 



In Raffray's 1904 treatment costaricensis runs off the key near centralis 

 Reitter with which it has little in common, and it would appear to have no 

 close relatives. 



Hamotus (Hamotus) alleei new species 



Type. Measurements: Head 0.37 x 0.23 mm.; pronotum 0.33 x 0.40 mm.; 

 elytra 0.53 x 0.74 mm.; abdomen 0.53 x 0.74 mm. Total length 1.8 mm. 



Shining reddish-brown when mature; pubescence long, silky and golden; 

 integument strongly punctate with base of pronotum cribrate, the femora and 

 tibiae scabroid, but the antennal club nearly smooth. 



Head elongate, one-third longer than wide, with long converging tempora 

 which are bearded. Eyes shorter than tempora, not prominent, medianly placed, 

 semilunar in lateral view and each of 56 moderately sized facets. Occipital 

 margin subretuse. Vertex elevated but dorsally flattened, with a pair of small 

 punctiform nude vertexal foveae between the eyes. Each vertexal fovea lies 

 in a pyramidal impression, and mutually closer than either to adjacent eye. 

 Front with inconspicuous antennal tubercles which are separated by a short 

 but deep longitudinal sulcus; this sulcus terminates posteriorly in a median 

 punctiform fovea. Front and clypeus as in costaricensis. Ventral surface of 

 head complex and nonhamotine: transversely tumid between eyes, the tumidity 

 mounted by an arcuate carina; this transverse carina connected to oral cavity 

 (submental boundary) by a longitudinal median carina; below each eye at 

 its ventral angle, the transverse carina forms an infraocular tubercle and this 

 tubercle is connected with posterior boundary of head by a longitudinal lateral 

 carina; enclosed surface between these three carinae flattened, with a trans- 

 versely oblong fovea at middle of base. 



