258 NEW YORK STATE MUSEUM 



]82(j ,C h i r onom u s t r i a n ii u 1 a t u s IMacq. Recueil Soc. Sc. Agrl. 



Lille. p.202. 30 

 383S c; h i 1- o n o lu ii s INIeigen. Sj'st. Beschr. 7 : 9, 139 

 1804 Chironoiuus vibratorius Meigen. Klass. 1 : 16, 13 



Male. Dorsum of the thorax yellow, with three hlack stripes, 

 often confluent posteriorly, a spot on each pleuron, the scutel- 

 lun), sternum and the metanotum shinin<i black. The abdomen 

 black, the base and the incisures yellowish or whitish, the incis- 

 ures of the fourth and fifth sei>iHents usually wider, fascia-like; 

 in fact tlie markinj;s of the abdomen somewhat variable; the anal 

 segment wide; the forceps white. Head brownish yellow; the 

 palpi darker; antennae brown, it's hairs lighter at the tips. Legs 

 black, the fore coxae and femora narrowly white at the bases, 

 each tibia with a wide white or yellow band at the middle, middle 

 femora with the bases widely yelloAA'ish, hind femora whitish to 

 the tip; fore tarsi all black or brown; middle tarsi to the third, 

 the hind tarsi to the fourth joint whitish ; metatarsus of the fore 

 leg about one half as long as its tibia. Wings whitish; venation 

 as figured (pl.29. fig.19). 



Female. The female has the base of the abdomen and the venter 

 yellow, the incisures being whitish. Length 2 to 3 mm. Schiner, 

 loc. cit. New Jersey (Johnson). Some sj)ecimens from ('liicago. 

 111., agree perferfly with the above descriptions, 



8. Cricotopus debilis Williston 



189G O r t h n c 1 a dins \\\U. Traus. Ent. Soc. London, r.275 



(Pl.29, fig.20) . 



Male. Jied or reddish yellow. Plumosity of the antennae 

 brownish-black, ^lesonotum with three shining brown spots or 

 stripes, narrowly se])a]'ated. Abdomen shMuler; eacli segtnent 

 with brow II jjoslerior band. Legs yellow; front femora brown on 

 distal end; front tibiae light yellow on the i)roximal half or two 

 fifths, dark bi-own on the distal j»ortion. about one third longer 

 than the corresponding metatarsi ; front tarsi infuscated; the four 

 posteiior femora sdiiicwlial infuscated distally. ^Vings hyaline. 

 IxMigth 2.5 to "5 iiMii. Williston. loc. cit. St Vincent Island. 



I have examined a cotyi>e sj)e(imen of this species now in the 

 Cornell uni\ei'sity collectijn, and find that it should be included 

 witli (' r i (• o t o ]Mi s . instead of with Orthocladius as 

 Professor ^\'illistoll iias it; unless, as tlie .\h\^e Kieffer has already 

 ])ointed out, (' r i <• o t (• p ii s should be considered as a synonym 

 of () r t li o (■ 1 a <1 i n s. 



