83 TRANS. ST. LOUIS ACAD, SCIENCE. 



more or less black femora ; and from all the other preceding spe- 

 cies belonging to this group by the white tarsi. 



CryptUS alblCaligatUS, n. sp.—c?.— Differs from albisoleaius, cf, n. sp., 

 only as follows : — i. The clypeusand vertex are punctate and opaque, and 

 the palpi are white except the last joint which is fuscous in all lights. 2. 

 The antenna are ^ as long as the body, immaculate and much less robust, 

 joint 3 being thrice (not twice) as long as wide. 3. The thorax is uni- 

 formly and rather coarsely punctate ; the parapsidal grooves shallow but 

 pretty distinct on the anterior J, and in addition there is a shallow median 

 groove nearly attaining the scutellar fovea. Metanotum very coarsely 

 rugose; the hind angles of the lateral areas turned vertically upwards in 

 a blunt tooth ; their cross carinas distinct and in range with the front ca- 

 rina of the central area, which is obscurely defined, twice as long as wide, 

 constricted in the middle, and confluent with the posterior area. Basal 

 area transverse ; posterior area indistinct. 5. The abdomen is elongate- 

 oval, 6i times as long as wide ; the ist joint 6 times as long as wide, scarce- 

 ly wider at tip than at base, the spiracle placed § of the way to the tip, 

 but without any tubercles, so that, except a slight inflation at the extreme 

 tip, and the usual slight dilatation at the extreme base, the joint is linear. 

 Joint 2 longer by ^ than wide, and 2^ times wider at tip than at base; 3 

 square ; the rest slowly shorter and shorter. Basal J of joint i black ; the 

 rest of the abdomen, as well as the venter, rufous. 5. The legs are black. 

 In the 4 front legs the knees and tibiae, except the inside of the tibize which 

 is rufous, are white ; and in all 6 legs the tarsi are white with joint 5 dusky, 

 and in the hind tarsi the basal | of joint i is black. 6. The wings are 

 tinged with smoky yellow. Radial area long, its posterior angle 135° with 

 its apex not in the least rounded off and abutting on the outer side of the 

 areolet. Areolet pentagonal ; its inner and outer sides parallel or scarcely 

 convergent in front; its inner side equal to its anterior side, and the 3 

 Other sides \ shorter and subequal. Length cf .46 inch. Front wing c? 

 about .30 inch. 



One S ; 9 unknown to me. Distinct from all the other S d 

 belonging to this section by the elongate, linear ist abdominal 

 joint, and from all the 9 9 by its conspicuous white tarsi. Very 

 like Cryptus {Ischnus) albitarsis^ c?, Cress., at first sight, but 

 distinct by its black face, tegulae, thorax, coxze, and trochanters. 



[Doubtless a mere variety of albit arsis. — Cresson.] 



Cryptus pictiCOXUS, n. sp. — (^. — Black. Head subopaque, densely and 

 very finely punctate. Orbits, very wide next the mouth, slender above 

 and behind, and interrupted behind as they approach the cheeks, clypeus 

 except its extreme tip and a large quadrate spot immediately above it and 

 almost confluent with the facial orbits, mandibles except their teeth and 

 palpi, all white. Antennae rather robust, 5 as long as the body, brown- 

 black with a white spot on the ist joint below; 1st joint of flagellum 2I 



