468 bulletin: museum of comparative zoology. 



its variety pilosulus Forel. In pilosity it is much like the typical 

 'picipes but is smaller and the surface of the body is more opaque and 

 the head of the maxima has the sides more nearly straight. It re- 

 sembles pilosulm in size but the latter is much more pilose and has 

 the antennal scapes covered with suberect hairs, its head is shaped 

 like that of picipes and the surface of the body is shining. In the male 

 jamaicensis the head is shorter than in picipes, the petiole is entire 

 above, the wings are tinged with brown, the legs are much paler and 

 the body is less shining and not so black. 



36. Camponotus {Myrmoihrix) hannani Forel. (Fig. 1 c and d). 

 y 9. — Newton, 3,000 ft.; Liguanea Plain. 



The female measures 12.5 mm., its wings 14 mm. It closely re- 

 sembles the maxima in color, sculpture, and pilosity but the head is 

 smaller, with straight sides and nearly straight posterior border. The 

 antennal scapes are narrower and less flattened, the upper border of 

 the petiole is sharp and rather deeply notched in the middle and the 

 posterior portion of each gastric segment is darker than the remaining 

 surface. The thorax is elongate, elliptical, not broader than the head, 

 the epinotal declivity is vertical and twice as long as the base. The 

 mesonotum and scutellum are very smooth and shining, their erect 

 hairs shorter than those of the worker. The wings are strongly tinged 

 with yellow and the veins and pterostigma are resin-colored. 



37. Camponotus {Myrmobrachys) capperi Forel. (Fig. 3, a). 



Forel places this species in his subgenus Myrm6thrix,.but it seems 

 to belong more properly in Myrmobrachys. In the typical capperi as 

 I find from examination of two cotypes received from Professor Forel, 

 the base of the epinotum is distinctly concave, with the epinotal angle 

 pronounced, so that the thorax is much like that of many Malagasy 

 and Australian species of Myrmosaga. The antennal scapes are 

 naked, save for a few erect hairs at their tips, and the tibiae have 

 short appressed hairs on their flexor surfaces. 



*38. Camponotus {Myrmobrachys) capperi var. fonnosulus, var. nov. 



Worker. (Fig. 3 d). Length 4.5-5.5 mm. 



Differing from the typical form in the shape of the head, wliich is 

 more elliptical in the larger workers, with more convex sides, in having 

 the base of the epinotum perfectly straight and horizontal in profile. 



