124 PROCEEDINGS OF SOCIETIES. 



*. 



Ord. DIPTERA. Fam. MUSCIDJE. Trib. EPHYDRINI. 



Discomyza cimiciformis (Ct. Mss.) Obscure ceriea, antennarum basi tarsisque 

 ferrugineis, halter ibus fuse is , alarum venula discali oblique flexa. Long. 1 ; alar. 

 21in. 



Not one-fourth the size of D. incurva. Dark brassy. Head rugose, with smooth 

 blackish frontal fillets. Second joint of antennae ferruginous, dusky at the tip ; 

 third oblong, dusky. Thorax finely scratched transversely, and pubescent. Ab- 

 domen smooth and glossy, the 4th segment much enlarged in the male. Legs 

 black; tarsi, except the last joint, ferruginous. Wings sooty, lighter behind. 

 Veins strong, blackish ; radial vein, from end of subcostal, almost contiguous to 

 the costal, but distinct at the end, which is but little farther from the cubital than 

 this from the subapical ; last segment of pobrachial about as long as the discal 

 veinlet, which is bent obliquely, making a very acute angle with the praebrachial 

 vein. 



Pelina anescens, Stenh. Eph. 210, 13 (1844) ; Ztt. D. Sc. cenea, Ztt. Ins. Lap. 

 Nigro-cenea hypostomate albicante, venula discali et abscissa pobrachiali 

 extrema cequilongis, tarsis nigricantibus. Var. tarsis flavicantibus. Long. 1 ; 

 al. 2 lin. 



Smaller and more slender than P. cenea, darker and more glossy, without the 

 coppery lines of the mesonotum, the face whiter, and the cheeks narrower. But 

 the most obvious difference is the greater distance of the transverse discal veinlet 

 from the margin, leaving the last segment of the pobrachial vein about as long as 

 itself. 



Mr. Hogan showed specimens of the (presumed) larvae of Digtossa mersa, pre- 

 served in spirits.* These were found on the sea-coast, at Baldoyle and Dingle 

 Bay, under stones, in company with the perfect insects, but are later than these in 

 their yearly time of appearance, not having been observed earlier than the end of 

 July. They resemble each other in their movements, quick and jerking ; and there 

 is an obvious analogy in the form of the mandibulae, &c., as shown in the figures 

 given in the present number. 



The meeting then adjourned. 



REFERENCES TO PLATE III. 



Fig. 1. OCHTHEBIUS RUFOMARGINATUS, Erichson ; Thomson. O. bicolor 

 var., Mulsant; Fn.Fr. 



Fig. 2. CERCYON DEPRESSUM, Stephens. C. dorso-striatum, Thomson. C. 

 Head. / Lateral outline of Prothorax. T.' Fore Tibia with Tarsus. K. Me- 

 sosternum and Metasternum. 



Fig. 3. OCHTHEBIUS PUNCTATUS, Larva. B. Antenna. M' Mandibula. M. 

 Maxilla. L.' Labrum L. Labium. P" Labial Palpus. 



Fig. 4. DIGLOSSA MERSA, Larva ; like references. 



Fig. 5. PTILIUM COARCTATUM. 



Fig. 6. PTILIDM CLANDESTINUM. 



Fig. 7. TRICHOPTERYX MOLLIS. B. Antenna, g. Underside of Pterothorax 

 with Abdomen. 



Figured, PI. Hi., fig. 4. 



