June 1893.] 



PSYCHE. 



27» 



AN A PORTA BRED FROM LIMACODES SP. 



BV C. H. TYLER TOWNSEND, LAS CRUCES, N. MEX. 



The Tachinid described below occurs 

 in a lot of Tachinidae sent me bv Pro- 

 fessor Comstock, from Ithaca, N. Y. 

 Aside from the knowledge of its para- 

 sitism, it is of peculiar interest as be- 

 longing to the genus Aporia, hitherto 

 recorded only from South America. 

 This genus differs from Exorista, to 

 which it is nearly allied, by the frontal 

 bristles not descending below base of 

 antennae, and the antennae being in- 

 serted below a line drawn throvigh the 

 middle of the eyes. The third antennal 

 joint is also considerably narrowed, and 

 the whole body is very bristly. 



Aporia limacodis n. sp. $. Eyes cin- 

 namon brown, thickly pubescent; front 

 very narrow, about as wide as one of 

 the antennal joints on posterior half, grad- 

 ually widening before ; frontal vitta nearly 

 obsolete behind, wide and triangular in front, 

 velvet brown; frontal bristles moderately 

 strong and all directed forward, absent just 

 before ocelli, ocellar and vertical bristles 

 hardly to be distinguished, all directed for- 

 ward, no orbital bristles; sides of front, face 

 and cheeks silvery white, the cheeks hardlv 

 one-third eye-hight and with a few bristles 

 on lower portion, sides of face narrow and 

 bare ; vibrissae decussate and inserted on 

 oral margin, facial ridges bare except several 

 bristles next vibrissae; antennae and arista 

 black, first two antennal joints and base of 

 third rufous; proboscis short, fleshy, brown- 

 ish, labella large and tawny ; palpi not large, 

 rufous, bristly, a little enlarged apically ; 

 occiput silvery, clothed with gray hairs. 

 Thorax wider than head or abdomen, shin- 



ing black, rather thinly silvery white polli- 

 nose. with four black vittae, the outer ones 

 interrupted at suture, humeri and pleurae 

 more distinctly silvery white pollinose; scu- 

 tellum black, silvery, with an apical decus- 

 sate pair of macrochaetae and two lateral 

 ones, the posterior lateral ones strongest. 

 Abdomen narrower than thorax, long coni- 

 cal, very bristly and hairy, shining black, 

 basal half or more of segments two to four 

 silvery white pollinose, first segment silvery 

 beneath and faintly so on sides above: first 

 segment with a strong lateral macrochaeta 

 and a median marginal pair; second with a 

 median discal pair and a marginal row of six 

 or eight; third with a median discal pair and 

 a marginal row of ten; anal beset with ma- 

 crochaetae except at base, second and third 

 segments with median anterior and sub- 

 marginal pairs of macrochaeta-like bristles. 

 Legs rather long, blackish, front femora sil- 

 very white pollinose on outside, tibiae pale 

 brownish rufous, bristly, claws and pulvilli 

 elongate, pulvilli smoky yellowish. Wings 

 longer than abdomen, rather hyaline, some- 

 what grayish, no stump or wrinkle at bend 

 of fourth vein, tegulae nearly white, halteres 

 tawny. 



Length of body, 9.5 mm. ; of wing, S mm. 



Described from one specimen ; Ith- 

 aca, N. Y. Bred by Professor J. H. 

 Comstock from Limacodes sp. Issued 

 May 30. 



A female which may belong to this 

 species was also sent me by Professor 

 Comstock ; it was collected June 28 by 

 Mr. S. H. Crossman, and differs as 

 follows : 



More generally silvery white pollinose; 



