410 NEW YORK STATE MUSEUM 



fourth at the cross veins. Venation as in figure 9. The basal 

 section of R^+j proximad of the B-M cross vein. Halteres pale, 

 with a fuscous knob. Nuttall and Shipley state and also show 

 in the figure which they give of the wing of maculipennis 

 that the subcosta extends almost to the tip of the wing. In all 

 specimens of females which I have examined this is not the case 

 with the American form. Should this difference be found con- 

 stant, Say's name of quadrimaculatus must be restored. 



Larva. According to the description and figure given by Nutt- 

 all and Shipley [1901] , it differs from that of punctipennis 

 in the following particulars. The six feathered hairs arranged 

 on the dorsal surface of the head are placed on a transverse 

 band of pigment. On the dorsal surface of the labrum are two 

 simple hairs projecting forward; these are more cephalad than 

 in punctipennis. The pigment spots arranged symmetri- 

 cally about the median line, so conspicuous in puncti- 

 pennis, are wanting in this species. At the end of the second 

 antennal joint is a four branched hair according to the figure 

 given by Nuttall, whereas this hair has six branches in p u n c t i- 

 p e n n i s. The mandibles show some differences. The only 

 differences in the hairy armature of the abdomen which I have 

 observed in punctipennis, in comparing with the descrip- 

 tion and figure of Nuttall" of maculipennis, is the presence 

 of one or two more of the long, simple hairs of segments 4 and 

 5 in the former species. 



Pupa. Agrees in all particulars with the description given for 

 punctipennis. A comparison of fresh specimens of both 

 species will be necessary to reveal differences. 



Genus psorophora Desvoidy 



Large species which resemble Culex in having a straight pro- 

 boscis ; the male has palpi as long as the proboscis, those of the 

 female being short. It differs from Culex in having many nearly 

 erect scales on the legs. 



Two species have been described from the United Startes. 



They may be distinguisjied by the characters given in the key 



below. 



Length 6mm exclusive of tlie probocis; cell 2d R much longer 

 than the cell M; body black, the humeri yellow, pleura and 

 sides of the mesonotum bearing many appressed white scales, 

 abdomen on the upper side covered with appressed violet pur- 

 ple scales, those on the first segment and a few at the hind 

 angles of some of the other segments white. (Hartsville 

 S. C.) Canadian Bnt, 1901, p.258 howardii Coquillett 



