118 



the lateral angles a little prolonged, a little narrower than the nicsono- 

 tum and ahout as long as the mesonotum and scntellum together; 

 propleura and prosternum loosely articulated with the pronotum ; 

 prosternum small, transverse, bounded laterally and in front by the 

 propleura which meet broadly below, above they are separated l)y 

 a small free cervical sclerite. 



Mesonotum slightly convex transversely, transverse sliglitly arcuate 

 behind, laterally finely margined, scutellum transverse a little narrower 

 and shorter than the mesonotum and separated from it by a straight 

 simple furrow which does not attain the lateral margins, impressed 

 obliquely at either side at the end of this furrow. 



Propodeum quadrate, narrower than the pronotum, slightly trans- 

 versely convex in the same plane with tlie mesonotum, separated 

 from it by a shallow furrow, bounded posteriorly by a fine line similar 

 to the transverse striations of its surface, the declivity transversely 

 rounded but exactly vertical as seen from the side. 



Mesopleura convex depressed beneath the ridge formed by the 

 projecting margin of the mesonotum, a curved foveolate furrow leading 

 up to the posterior margin of the mesonotum from the round pit 

 just above the middle coxae, sides of propodeum concave. 



Legs rather slender, not at all spinose. all the coxae contiguous, 

 the femora slightly thickened, the anterior and posterior more so than 

 the middle femora, hind trochanters two jointed; front and middle fe- 

 mora about as long as their tibiae, the hind tibiae longer than their 

 femora; calcaria feeble i, 2, i, calcaria of the middle legs unequal, 

 hind calcaria curved, basitarsi slender elongate, a little shorter than 

 their tibiae and about as long as joints 2-5 of the tarsi, all the joints 

 sub-cylindrical, ungues small. 



Abdomen oval, slightly broader than the mesonotum, convex above 

 and beneath with four visible tergites and sternites; tergites i and 2 

 subequal, occupying the greater part of the tergum, sternite i emargi- 

 nate behind much smaller tlian 2 which occupies the greater portion 

 of the venter, other sternites and tergites transverse, the tergites and 

 sternites are simple, without depressed margins or other special struct- 

 ures except that tergite i has a feeble imperfect elevated line at the 

 edge of tlie declivity. Type .lliciiiis acniiiiiiaficiis Bridwell. 



Alienus aenigmaticus n. sp. 



Sex, indeterminate. 



Black, the vertex and face with dark bronzy greenish metallic re- 

 flections, pedicel and ist and 2nd flagellar joints and legs, from the 

 coxae on, yellowish testaceous. 



Concavity of face shining, coarsely transversely striate with the ends of 

 the striae directed downward, above these some striae parallel to the or- 

 bits, vertex smooth and shining finely and sparsely punctate, a shallow 

 depressed space on the vertex behind the ocelli ; pronotum with 



