334 Entomological Society. 



3. Cryptocerus argentatus. 



Female. Length 5 lines. Shining black ; head finely and distantly 

 punctured, rounded in front and convex above ; the stemmata three, 

 placed in a triangle wide apart ; the lateral raised margins of the head 

 narrow, commencing in front opposite the base of the mandibles, and 

 gradually narrowing backwards to the posterior angles of the head, 

 which are acute ; prothorax acute at the anterior lateral angles ; the 

 metathorax on each side at the base produced into a broad acute an- 

 gular tooth, and at the posterior angles also forming a longer spine 

 curving slightly upwards ; the first node of the abdomen produced 

 posteriorly on each side into a sharp stout spine curving upwards ; 

 the second node has anteriorly on each side a stout acute spine 

 curving outwards ; the abdomen is very smooth and shining, and has 

 on each side, nearly touching the basal angle, an ovate yellow macula, 

 which is sprinkled over with silvery scales or hairs, the apical seg- 

 ments are covered with silvery hairs ; the wings fusco-hyaline ; the 

 thorax minutely and distantly punctured ; the legs outwardly are 

 sprinkled with short silvery hairs. 



Hah. Columbia. In my own collection. 



4. Cryptocerus D" Orbignyanus, Westw. MSS., n. sp. 



Female. Length 4 lines. Black, head and thorax covered with 

 strong shallow pimctures, the abdomen delicately and very closely 

 punctured, the entire insect sprinkled with minute golden hairs ; the 

 produced lateral margins of the head rufo-testaceous anteriorly, the 

 mandibles and antennae of the same colour ; thorax, the anterior and 

 posterior angles acute, forming short spines ; wings slightly fuscous, 

 stigma fuscous, nervures pale testaceous, legs ferruginous ; the first 

 node of the abdomen produced in the middle laterally into a short 

 acute spine ; the second node has on each side anteriorly a recurved 

 spine ; abdomen elongate, narrowing slightly towards the base. 



Hah. South America. 



Of this species I have only seen the single specimen kindly lent to 

 me by Mr. Westwood for description. 



5. Cryptocerus femoralis, Westw. MSS., n. sp. 



Neuter. Length 2^ lines. Black, the head, thorax and legs co- 

 vered with shallow punctures, each containing a minute glittering 

 scale or hair ; the lateral margins of the head expanded before the 

 eyes, the marginatiou testaceous, the hinder angles acute, the an- 

 tenUcC sprinkled with glittering hairs ; the sides of the thorax ante- 

 riorly testaceous, the anterior portion transverse quadrate, behind 

 which the sides are deeply notched, the notch containing a recurved 

 spine ; the metathorax transverse, its anterior margin arched, the 

 lateral and posterior margin curved inwards, the posterior angles 

 ])roduced into a sharp spine ; the nodes of the abdomen transverse. 



